What is CVE-2023-20528?

CVE-2023-20528 is a low-severity vulnerability in AMD 2nd Gen Epyc, classified under Improper Input Validation. CVSS score: 2.4/10. Published 2023-01-11.

How severe is CVE-2023-20528?

Low severity. CVSS v3 base score is 2.4 out of 10.

Improper input validation in AMD 2nd Gen Epyc

CVE-2023-20528

Insufficient input validation in the SMU may allow a physical attacker to exfiltrate SMU memory contents over the I2C bus potentially leading to a loss of confidentiality.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2023-01-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 2.4 (Low). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (16.4th percentile), scored 2026-11-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 16.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.000

Affected products

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032 (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2023-20528?: CVE-2023-20528 is a low-severity vulnerability in AMD 2nd Gen Epyc, classified under Improper Input Validation. CVSS score: 2.4/10. Published 2023-01-11.
How severe is CVE-2023-20528?: Low severity. CVSS v3 base score is 2.4 out of 10.